Southwestern desert birds live on the edge but have adapted over time. Now the evidence suggests they are struggling to adapt to rapid climate change.

The fossil, an enormous leg bone found in the Tatacoa Desert, suggests that this bird stood over three meters tall, making it the largest known member of its kind to date.

A fossil fragment indicates that the ancient predator was 20% more massive.

These birds, which have been found primarily in southern South America, had slender bodies and unique locomotor adaptations for running, with the largest species being flightless.

The researchers said in their findings published Monday in the Papers in Palaeontology journal that unique features about the leg bone suggest the bird is a previously undiscovered species ...

A Bizarre Beak And Jaw Built For Power. What the research team discovered is unlike any other known prehistoric bird anatomy. The skull exhibits a combination of traits that point toward both ...

Researchers including a Johns Hopkins University evolutionary biologist report they have analyzed a fossil of an extinct giant meat-eating bird—which they say could be the largest known member of its ...